Baxi 5111139 Diaphragm Replacement Kit.
Models this fits
Potterton PERFORMA 24 I HE
Order before 2.30pm for next working day delivery (orders placed after 2.30pm will be processed the following working day). Please note if you have ordered an item which is listed as next day delivery with an item which has a longer lead time they will be sent together at the longer lead time.